ul,
li {
    padding: 0;
    margin: 0;
    list-style: none;
}

.adver {
    margin: 0 auto;
    width: 700px;
    overflow: hidden;
    height: 454px;
    position: relative;
    background: url("../images/adver01.jpg");
}

ul {
    position: absolute;
    bottom: 10px;
    z-index: 100;
    width: 100%;
    text-align: center;
}

ul li {
    display: inline-block;
    font-size: 10px;
    line-height: 20px;
    font-family: "΢���ź�";
    margin: 0 1px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #333333;
    text-align: center;
    color: #ffffff;
}

.arrowLeft,
.arrowRight {
    position: absolute;
    width: 30px;
    background: rgba(0, 0, 0, 0.2);
    height: 50px;
    line-height: 50px;
    text-align: center;
    top: 200px;
    z-index: 150;
    font-family: "΢���ź�";
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    display: none;
}

.arrowLeft {
    left: 10px;
}

.arrowRight {
    right: 10px;
}

li:nth-of-type(1) {
    background: orange;
}